Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

With no annotations, the description carries the full burden and discloses almost nothing: no mention of scrolling the element into view, waiting for navigation or network idle after the click, permission/session requirements, or failure modes for an invalidated ref. Only the snapshot prerequisite is surfaced.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Is the description appropriately sized, front-loaded, and free of redundancy?

Very short and front-loaded, but under-specification rather than conciseness: the 'Cursor parity' parenthetical consumes space without informing, while the parts that need words (behavior after click, parameter meanings) are absent.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

A four-parameter, two-required mutation-style browser tool with no annotations, no output schema, and 25% schema coverage needs far more than three words. An agent cannot tell what state changes, what happens on a stale ref, or how tab_id and element interact with ref.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema description coverage is only 25% — only notification_message is documented. The description explains 'ref' obliquely as a snapshot reference, but says nothing about tab_id (which browser tab/session to act on) or the optional 'element' parameter, leaving half the surface ambiguous in both schema and prose.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Does the description clearly state what the tool does and how it differs from similar tools?

States a specific verb (Click) and a specific addressing mechanism (by snapshot ref), which usefully distinguishes it from coordinate-based siblings like browser_mouse_click_xy and browser_drag. The parenthetical 'Cursor parity' is opaque jargon that adds nothing, but the core purpose is unambiguous.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Does the description explain when to use this tool, when not to, or what alternatives exist?

'Snapshot first' encodes a genuine prerequisite — the ref must come from a prior browser_snapshot call — which is real routing guidance. However, it never says when to prefer this over browser_mouse_click_xy, browser_interact, or browser_dom_input, nor what to do when the ref is stale.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.